Home / 13,690.26-18,892.28-7,721.93

Finding the Fourth Proportional to 13,690.26, 18,892.28 and 7,721.93

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Solution

The fourth proportional to 13,690.26, 18,892.28 and 7,721.93 is: 10,656.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.26 : 18,892.28 = 7,721.93 : x
  2. Step 2: Convert to fraction form
    13,690.26/18,892.28 = 7,721.93/x
  3. Step 3: Cross multiply
    13,690.26x = 18,892.28 × 7,721.93
  4. Step 4: Simplify right side
    13,690.26x = 145,884,930.24
  5. Step 5: Solve for x
    x = 145,884,930.24/13,690.26
  6. Step 6: Final answer
    x = 10,656.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.